Improvement in rag-engines of paper-making machines



UNITED ASTATES PATENT OFFICE.

JONATHAN FAW, OF LOCKLAND, OHIO.

IMPROVEMENT lN RAG-ENGINES OF PAPER-MAKING MACHINES.

Specification forming part of Letters Patent No. 38,735, dated June 2,1863.

used for grinding stock into pulp for the manufacture of paper whilegrinding the same; and I do hereby declare that the following is afull,clear, and exact description of the construction and operation of thesame, reference being had to the accompanying drawings in this case, inwhich- Figure l represents a plan or top view of an ordinary rag-enginecap, with the deflectors which constitutemy invention attached thereto;Fig. 2, a longitudinal elevation, and Fig. 3, atransverse section, ofthe same. FigArepresents a plan of my detlector, and Fig. 5 a sideelevation of the same.

The nature of my invention consists in providing detlectors which areplaced on the ins`de ofthe cap of a rag-engine, and which, incombination with the cap, deflect the stock in the engine during theprocess of grindingl from the inside or short circumference to theoutside or long circumference.

The object of my invention is to secure uniformity in the quality of thepulp.

The detlector E may be made either of wood or metal, with a plainsurface or with a concave surface, and is represented with a concavesurface in the drawings above referred to, and may be permanentlyattached to the Y inside of the ordinary cap of any rag-engine of theusual kind, immediately behind the roll of the engine, as shown at Fig.6, and may be used at any stage of the grinding, whether the stock becoarse or fine, long or short. I propose to place a deiiector on eachside of the cap, as shown in the drawings by Figs. 1 and 3, either ofequal height, as shown, or at dif ferent elevations.

The stock, in passing between the roll and the bed-knives, is thrownviolently upward immediately behind the roll, and, thereby coming incontact with the deectors, is thereby deiected from the long to theshort `and from the short to the long circumference of the engine duringthe process of grinding, thereby overcoming a difliculty at presentexisting in all rag-engines, by reason of which the'stock on the insideor short circumference is ground much ner than that on the outside orlong circumference. The shortest distance traveled by the stock is inpassing around the midfellow, which is the support ofthe end of the rollin the center of the engine. The longest distance traveled by the stockis yin passing around the engine next to the outside, which will befound to be equal to about twice the distance around the mid-fellow.

By placing deiiectors constructed and ar ranged as above described inthe cap of ordinary rag-engines the stock is constantly changingposition, being diverted in its course from the center or mid-fellow tothe circumference of the engine, and vice versa, during the process ofgrinding, in consequence of which a more even pulp is made, thusfacilitating the operation of grinding and making a better quality ofpaper.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination, with the cap of a ragengine, of the deflectors E,constructed and arranged as and for the purposes set forth.

JONATHAN FAW.

Witnesses:

W. CORNELL, Jr., S. CoNsTABLE.

